Coke oven and door therefor



March 3, 1931. c. STILL 1,795,239

com: OVEN AND noon THEREFOR Filed Oct. 26, 1926 Patented Mar. 3, 1931 PATENT; OFFICE cannsmn, or nnoxnmermusnn, GERMANY con". OVEN AND noon. summon Application 11601 October 26, 1926, Serial 1T0. 144,288, and in Germany March 22, 1926.

My invention relates to coke oven doors and its main object is the provision of means ofan extreme simplici and convenience for permitting the expansion of the coke oven 5 charge during operation.

' Coke oven doors are known in which there is a certain amount of flexibility allowed for the expansion of the charge, for example by means of movable parts provided on the inner side of the door, or by the provision of means 'for displacing the whole door itself in the direction of the axis of the oven.

These known devices have thedrawbacks that they are either too expensive and complicated or they pair'and render difficult the sealing of the door.

In the coke oven door according to the invention flexibility permitting the expansion of the coal charge is obtained in the simplest and most effective manner by providing the inner lining of the door with recesses or cavities of such form and disposition that as the coal expands it is pressed into the recesses.

The accompanying drawing represents an example of .a coke oven door according to the invention in vertical central section through the door and the adjoining portion of the oven chamber. The oven chamber 7: is closed by a door t which is fastened in the usual manner by lockmg ars (2 supported in the buckstays i of theovens, and by wedges It engaging with the former. The -door t has a limng formed substantially by firebricks 1' .and 8. The'bricks r are shorter. than the bricks s, so. that recesses or-oavities are formed between the projecting ends of the bricks 8. In the example illustrated these re- 49 cesses extend in the horizontal direction over the whole width of the door t, but intermediate bricks rof the same length as the length of the bricks 8 may be arranged at'intervals in order to strengthen the brickwork and the durability of the lining. The coal 7 slips when the oven is charged fora certaindistance into the recesses of the lining in the form of inclined protrusions 12, but behind these thereare still free spaces 0. If 50 the coal charge 7' during the progress of cokpose it is necessary that the recesses should take up the lar est possible portion of the whole inner sur ace of the lining and should not be too narrow. When these conditions are fulfilled, a very effective flexibility is obj tained by-the simplestmeans permitting the expansion of the coal charge, and the inconvenient and dangerous consequences of the expansion due to theswelling of the coal to be coked during the working, which often" result in important damage to the whole battery of ovens, are successfully avoided.

What I claim is:

1.. A coke oven door comprising a metallic shell and alternate rows of short and long firebricks carried by the shell and forming a firebrick lining having recesses to receive the expanding coal charge.

2. A coke oven door comprising a hollow metallic shell and alternate rows of short and. long firebricks fitted in the shell, the short firebricks being flush with the inner edges of the shell and the long firebricks projecting beyond the same to produce recesses for the reception of the expanding coal charge.v

3. A coke oven adapted to receive a coal charge therein and having a wall provided with a doorway, a door for closing said doorway, a firebrick lining in said door the ad-' jacent firebricks of which extend inwardly to different extents, thereby providing r'ecesses or cavities into which the coal charge can enter when expanding.

4. A coke oven adapted to receive a coal charge therein and having a wall provided with a doorway, a door for closing said doorway, a firebrick lining carried by said door, alternate rows of .firebricks extendin inwardly to difierent extents, the longer 0 said firebricks being tapered so as to be thinner at their projecting free ends.

Q 5. A coke oven door having rigidly attached means providing recesses to permit the expansion of the adjacent coal charge, the total surface area of the recesses covering a greater portion of the exposed face of the Y door than the remaining unrecessed portions.

6. A. coke oven door having fire brick means exposed to the adjacent coal charge and arranged to provide recesses for the rece tion of the expanding coal, said recesses gemg larger at their entrance than at their ase.

7. A coke oven adapted to receive a. coal charge therein and having a wall provided with a doorway, a door for sealing said doorwayhaving an inner surface provided with projections and recesses, the tops of the recesses forming an angle with the horizontal line more acute than the slope inclination of the coal charge in the recesses and the total surface area of the recesses being greater,

than the remaining'unrecessed portion of the inner surface of the door.

8. A coke oven door having recesses exposed to the coal charge within the oven, the total surface area of the recesses covering a greater portion of the exposed face of the door than the remainin unrecessed portion.

In testimony 'whereo I aflix my signature.

CARL STILL. 

